This article reviews the concept of policy entrepreneurship and its use in explaining policy change. Although the activities of policy entrepreneurs have received close attention in several studies, the concept of policy entrepreneurship is yet to be broadly integrated within analyses of policy change. To facilitate more integration of the concept, we here show how policy entrepreneurship can be understood within more encompassing theorizations of policy change: incrementalism, policy streams, institutionalism, punctuated equilibrium, and advocacy coalitions. Recent applications of policy entrepreneurship as a key explanation of policy change are presented as models for future work. Room exists for further conceptual development and empirical testing concerning policy entrepreneurship. Such work could be undertaken in studies of contemporary and historical policy change.